Abstract
Tennentsia koreana n. sp. is the first representative of the family Dysmorphoptilidae described from the UpperTriassic of South Korea. This discovery extends the distribution of the genus Tennentsia in Asia and suggests that it wasbroadly distributed during the Triassic. Tennentsia koreana n. sp. differs from the other species currently included in thegenus Tennentsia, inter alia, because of its tegmen not (or only slightly) emarginate at CuA, RA1 with a weak anteriorbranch, RA2 not strongly anteriorly curved, with two well-defined branches, strigil in basal part of costal space withcoarse punctation.